An isolate of virus was obtained from Dolichos lablab in Tai-an, Shan. dong Province. It infected 10 plant species from 5 families out of 38 plant species from 9 families tested. It caused systematic mosaic on Dolichos lablab and Chenopodium quinoa, and local lesions on C. amaranticolor. Its thermal inactivation point was 60—65℃ dilution end point was 10~(-8)-10~(-4) and longevity in vitro was 3—5 days. Myzus persicae was demonstrated as aphid vector Virus particles were filamentous, about 700—760nm×12nm. P...